I'm still trying to build the strength to get to a pull-up. I do Olympic weightlifting/weightlifting 4-5 times/week. So far, once a week after a workout I do a 5x5 of barbell rows, and once a week at the end of a different workout I do 3-4 max sets of body rows. Recently I switched the body rows out for the assisted pull-ups described in Step 2 of this page, the ones where I put my feet on the bench. I increase the difficulty of assistance if I can do more than 5 or so at the last set.

I also do jumping pull-ups as they come up in my conditioning workouts.

I haven't been happy with my rate of progress though. How can I speed things up? Add another day of max assisted pull-up sets? Switch out the barbell rows for more assisted pull-ups? Do sets across instead of max sets? Does anyone have any suggestions? My main focus is on Olympic weightlifting, but I would really like to get a pull-up in the next couple of months.

Also: I don't have a GTG option right now--no place to put a pull-up bar in my apartment and can't afford the ones that fit over door frames .

Emily,
Have you considered using woody bands or bands to assist you with your pullup progression?

Honestly, if you want to improve your pull ups, even though OLy lifting is your focus, I would incorporate the jumping pull ups, assisted pullups, and other pull up variations into your olympic lifting warm up. In other words, I would go ballz out with pull ups pre-snatch or clean and jerk, but I would do a few to GTG at the beginning of the session, while you're fresher. The return to movements for full out sets after you've done your lifts and your primary assistance movements.

I don't know if that's something you'd considered or not? Don't even know if it's good advice or not?

The bands saved my ass with pull ups. Straight up density training with the bands will get you there. It can also help to really look at the flight path- most people who can't do them visualize them different than they actually are, which makes them impossible.

Emily, I've tried negative reps, jumping pull ups and other exercises but I really made progress on my pull up strength when I started to use straps on a chin up bar.
Now I know most people will frown on using straps but I found they helped when I could focus on the actual movement without worrying about grip. (for the record, I weighed 105kg when I started trying to do pull ups and not all of it muscle dammit) Now able to do sets of 6-10... Wasnt easy took a long time but it worked for me
Once I was able to do a couple of pull ups without straps I would knock out as many reps as I could and then add straps for a couple more if possible.

Yeah, those are all good exercise ideas, I guess I'm wondering about how to specifically program them in. What kind of set/rep schemes? How many days a week? I tend to overdo things so I'm trying to be careful. And should I drop the barbell rows?

What worked for me was buying an Iron Gym and then randomly practicing them throughout the day. I don't think you really need to worry that much about following a strict program, just do them when you're pretty fresh - I know how you feel though, I'm trying to get HSPUs right now and ugh progress is slow.